package com.fqcar.fqdf.util;

import android.app.AppOpsManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.os.Build;
import android.provider.Settings;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Created by l on 2017/3/6.
 * 状态栏
 *
 */

public class NotifictionUtil {

    /**
     * 如果应用的通知栏没有打开，则需要提示用户前去打开通知栏,判断通知栏是否打开代码如下：
     * 返回值为true时，通知栏打开，false未打开
     */
//    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    public static boolean isNotificationEnabled(Context context) {

        String CHECK_OP_NO_THROW = "checkOpNoThrow";
        String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
        AppOpsManager mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
        ApplicationInfo appInfo = context.getApplicationInfo();
        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;

        Class appOpsClass = null;
     /* Context.APP_OPS_MANAGER */
        try {
            appOpsClass = Class.forName(AppOpsManager.class.getName());
            Method checkOpNoThrowMethod = appOpsClass.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE,
                                                                                             String.class);
            Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);

            int value = (Integer) opPostNotificationValue.get(Integer.class);
            return ((Integer) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) == AppOpsManager.MODE_ALLOWED);

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return false;
    }

    /**
     * 以下代码为前往设置页面：
     * 注：测试功能时发现，若在应用设置中关闭app的通知栏/不勾选显示通知，则Toast无法显示
     * @param context
     */
    public static void goToSet(Context context){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.BASE) {
            // 进入设置系统应用权限界面
            Intent intent = new Intent(Settings.ACTION_SETTINGS);
            context.startActivity(intent);
            return;
        }
        else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {// 运行系统在5.x环境使用
            // 进入设置系统应用权限界面
            Intent intent = new Intent(Settings.ACTION_SETTINGS);
            context.startActivity(intent);
            return;
        }
    }
}
